Hi, I had the same type of alternator brush in my 97 4Runner 2wd at 239k.
It was super worn down.
The part# is 27370-35060.
I bought it from Amazon.
https://www.amazon.com/Genuine-Toyota-27370-35060-Alternator-Assembly/dp/B00P2R6XJS/ref=sr_1_3?keywords=27370-35060&qid=1573858346&sr=8-3
